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Fair Value Measurements (Details Textual) - USD ($) $ in Millions	Jul. 31, 2015	Jul. 31, 2014
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	$ 9.1	$ 9.5
Carrying value of investments	3.4	1.8
Long-term Investments [Member]
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	9.1	9.4
Other Current Assets [Member]
Fair Value Assets Liabilities Quantitative Information [Line Items]
Fair value of investments in hedge funds	$ 0.1	$ 0.1

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Investment in hedge funds.

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This item represents a financial instrument (as defined) for which it is not practicable to estimate fair value. Such disclosure may be for an individual financial instrument or a class of financial instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 325



-SubTopic 20



-Section 25



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592

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